15:38
إِلَىٰ يَوْمِ الْوَقْتِ الْمَعْلُومِ
Transliteration:
Ila yawmi alwaqti almaAAloomi
Word by Word:
Till the Day (of) the time well-known."
Translations:
till the Day the time whereof is known [to Me alone]."
"Till the Day of the Time appointed."
Till the Day of appointed time.
Till the period of the time made known.
Until the Day of the time well-known."